cc: Nine patch layer.

cc/image_layer_updater.cc

+// Copyright 2012 The Chromium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+#include "config.h"
+
+#include "cc/image_layer_updater.h"
+#include "cc/resource_update_queue.h"
+
+namespace cc {
+
+void ImageLayerUpdater::Resource::update(ResourceUpdateQueue& queue, const gfx::Rect& sourceRect, const gfx::Vector2d& destOffset, bool partialUpdate, RenderingStats&)
+{
+    m_updater->updateTexture(queue, texture(), sourceRect, destOffset, partialUpdate);
+}
+
+// static
+scoped_refptr<ImageLayerUpdater> ImageLayerUpdater::create()
+{
+    return make_scoped_refptr(new ImageLayerUpdater());
+}
+
+scoped_ptr<LayerUpdater::Resource> ImageLayerUpdater::createResource(
+    PrioritizedTextureManager* manager)
+{
+    return scoped_ptr<LayerUpdater::Resource>(new Resource(this, PrioritizedTexture::create(manager)));
+}
+
+void ImageLayerUpdater::updateTexture(ResourceUpdateQueue& queue, PrioritizedTexture* texture, const gfx::Rect& sourceRect, const gfx::Vector2d& destOffset, bool partialUpdate)
+{
+    // Source rect should never go outside the image pixels, even if this
+    // is requested because the texture extends outside the image.
+    gfx::Rect clippedSourceRect = sourceRect;
+    gfx::Rect imageRect = gfx::Rect(0, 0, m_bitmap.width(), m_bitmap.height());
+    clippedSourceRect.Intersect(imageRect);
+
+    gfx::Vector2d clippedDestOffset = destOffset + gfx::Vector2d(clippedSourceRect.origin() - sourceRect.origin());
+
+    ResourceUpdate upload = ResourceUpdate::Create(texture,
+                                                   &m_bitmap,
+                                                   imageRect,
+                                                   clippedSourceRect,
+                                                   clippedDestOffset);
+    if (partialUpdate)
+        queue.appendPartialUpload(upload);
+    else
+        queue.appendFullUpload(upload);
+}
+
+void ImageLayerUpdater::setBitmap(const SkBitmap& bitmap)
+{
+    m_bitmap = bitmap;
+}
+
+}